Systemd
Many Linux distributions (including Ubuntu) use systemd which manages system services.
In the following text an example service named vultrdata is used for illustrative purposes.
A service is defined in a file named like /etc/systemd/system/vultrdata.service. Unit files have a format like in this example:
[Unit]Description=Vultr Instance Metadata ServiceAfter=network.target[Service]User=vultrdataWorkingDirectory=/opt/vultrdataRestart=alwaysEnvironment=API_KEY=____________________________________ExecStart=/opt/vultrdata/vultrdata --addr 10.1.2.3 --port 8888 --userdata[Install]WantedBy=multi-user.target
After creating the file in the /etc/systemd/system directory, issue this command to register it:
$ sudo systemctl daemon-reload
Then you can check the status:
$ sudo systemctl status vultrdata● vultrdata.service - Vultr Instance Data ServiceLoaded: loaded (/etc/systemd/system/vultrdata.service; disabled; vendor preset: enabled)Active: active (running) since Sun 2020-04-05 19:35:56 UTC; 1 weeks 0 days agoMain PID: 19694 (vultrdata)Tasks: 16 (limit: 4661)CGroup: /system.slice/vultrdata.service├─19496 /opt/vultrdata/vultrdata --addr 10.1.2.3 --port 8888 --userdata└─19509 /opt/vultrdata/vultrdata --addr 10.1.2.3 --port 8888 --userdata
Or start, stop, restart it:
$ sudo systemctl start vultrdata.service$ sudo systemctl stop vultrdata.service$ sudo systemctl restart vultrdata.service
You can enable or disable starting the unit/service on system startup:
$ sudo systemctl enable vultrdata$ sudo systemctl disable vultrdata
You can see/tail all systemd logs, or just for your service (unit):
$ sudo journalctl -f$ sudo journalctl -f -u vultrdata
Last updated 12 months ago